SpaceChem
Lay out visual programs that build molecules in chemical reactors
You work as a reactor engineer and build factories that turn raw materials into chemical products. Inside each reactor you lay out paths and commands on a grid that grab, bond and move atoms. Then you streamline your designs to meet production quotas while dealing with threats to your colony.
Paid · No login · Desktop · Intermediate
About SpaceChem
It is visual programming: you place instructions instead of typing code. It trains planning, timing between parts that run at the same time, and debugging. It suits patient puzzle fans, with or without coding experience.
It is a paid game from Zachtronics, first released in 2011, for Windows, macOS and Linux on Steam, GOG and itch.io. The 63 Corvi add-on brings a prequel campaign and a new quantum junction mechanic.
On Breakpoint since 23 Oct 2026.